PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16008552-6 2005 The difference in chloride sensitivity between ACE2 and ACE was investigated, and the absence of a second chloride-binding site (CL2) in ACE2 confirmed. Chlorine 129-132 angiotensin converting enzyme 2 Homo sapiens 137-141